Belt conveyer



T G. NYBORG BELT CONVEYER March 22, 1932.

Filed March 25, 1930 2 Sheets-Sheet.

HTTOH/VEV March 22, 1932.

T. G. NYBORG BELT GONVEYER Filed Maroh-25, 1930 2 Sheets-She et 2Patented Mar. 22, 1932 UNITED ST TE PATENT OFFICE rear. enone NYBORG, orWORCESTER, ENGLAND, ASSIGNOR or ONE-HALF '10 MARK FREDERICK HIGGINS, orWORCESTER, ENGLAND BELT CONVEYER Application filed. March 25, 1930,Serial No 438,874, and in Great Britain March 27, 1929. V

This invention relates to conveyers of the kind employing endlesstravelling belts; It has already been proposed in such conveyers toprovide a pair of anti-spillage shelves running in the direction of thelength of the conveyer below the two edges of the belt, the belt restingon the said shelves when loaded, or on material gatheredthereon.

It is an object of the present invention to provide an improved form of.shelf construction in which, theanti-spillage shelves are provided withinner downwardly directed It is a further object ofthe inventiontoprovide bearings for the supporting rollers belt so that any' spillagefrom the belt is thrown clear of them and the upper surfaces of whichform with the interrupted sections of the anti-spillage shelves acontinuous channel to collect dust and small particles thrown ofi thebelt.

It is a further object of the invention to provide an .improvedconstruction whereby the supporting frame may be adapted to support to.the anti-spillage shelves and bearings ofthe above-mentioned kind.

The invention isillustrated in the accompanying drawings in which iFigure 1 illustrates a general view of a conveyer according to thepresent invention, Figure 2 represents a side view, and Figure 3 a planof a preferredform. Figure 4 is a side sectional view. of Figure 2 takenon the line 1v 1v,

I Figure 5 is a perspective v1ew shown separately of a member utilizedin Figs. 2 to 4, and

Figure 6 shows a view of the loaded belt to a smaller scale.

Referring now to the form illustrated, the conveyer sections aresupported by frames 1 spaced at intervals in known manner. The flattenedtops of the frames 1 are holed at 2 toreceive a bolt 3 having a shoulder4. An .L-shaped metal section 5 is supported on the 50. shoulder 4, andan L-shaped platefi rests on which are located beneath thewidth ofthethe web of the section 5, the'plate 6 being.

riveted to and supporting a second L-shaped metal section 7 whichextends in line with the metal section 5 to, form .a structural supportfor the side plates 8 of the c'onveyer which are attached to thesections by rivets, the joints between ,adacent side plates being closedby bridge pieces 9. The end of the right hand plate 8 is cut square asshown in Fig. 2, but the end ofthe oppositely placed left hand sideplate of this figure is cut away as shown at 8a. The vertical web of thesection 5 is also cut away as 'shown at 5a,

The side plates 8 carry the anti-spillage shelves which comprisedownwardlydirected inner portions 11 extending inwards towards themiddle line of the 'conveyer at an angle of about to the horizontal. Theoblique inner portions of the anti-spillage shelves are surmounted attheir outer upward ends by curved portions, 12 which areupwardlyj convexi. e. they are arcuate so that the upwardly extending portions 11gradually curve off into horizontal elements. In the form shown thecurvilinear portion is extended beyond the upper horizontal elementuntil it ultimately forms a downwardly directed element 13 which servesas a means of attachment for the anti-spillage shelf to the side plates8 by the intermediary of rivets 14;.

It is understood that the anti-spillage shelves are formed ininterrupted sections extending between adjacent bearings for thesupporting rollers 15 for the belt 16, their downwardly directed websbeing cut away obliquely as shown in Figs. 2 and 3 on the side of eachbearing so that the bearings and shelves form a continuous channel toprevent material from falling onto the lower belt length.

from ,the bolts 8 in a manner which will now be described. One of thebearings 20 isshown separately in Fig. 5 in perspective view, from whichit will be seen that the bearing proper comprises a block or castingprovided with a central slot 22 to receive the spindle of the Thebearings 20, 21- Fig. 3, are supported 7 roller 15; the oppositebearings 21 are preferably closed it being assumed that the coalorothermaterial is thrown on the belt towards shaped to lie snuglyundenthe-upper part 2 of the frame 1, thecentral;portion-being.

holed to receive the lower threaded'end o1 bolt 3 on which it issupported in the 'asse'm bled position by means of a nut 27.

The blockportion 20 of thecastingis pro-- vided on each side with a lug30, 31 shaped to the curvature of the parts 12, 18 of'the antispillageSl'l'BlVStO form" supports for' the ends" o'f these shelves. As clearlyshown in Figures 3 and 4, the bearings 22 are located beneaththeextended widthotthe belt 16 so that any spillage falling over" the edge"of the" belt intermediate the shelves will fall down the inclined face23 of the casting and be prevente'd'froni' clogging'up the bearingfor-the roller 5. Other debris remainingbet'w'een theside plates 8 willremain on the shelves or be picked up'again by'the belt as its movementfluctuates.

I'n the normal'unloaded position, the belt l6lie'sjfust clar'otthetopotthe portion 12 of the an'ti s'pillage shelves which areonly slightly lower than the tops of the rollers 15', 19, but whenloade'dth'e belt is depressed and; contacts lightly with theanti-spillage shelves. As the belt is usually unevenly loaded, it'will'curve more or'less as it travels and willmake'a sliding contact with thearcuate" portions 12"of the shelves; Further, the belt usually swingsfrom side to' side as it travels, and here again the margins ofthe beltwill slide smoothlyup and downthearcth ate portions 12, makingacontinuous seal against thepossibility' of dbris falling down theshelves between the side plates. Debris will,- of course, collect intheangl'e between the portions' 13" and theside plates but it cannotfall clear, and when the amount is'ex'cessive, it will be pushed about alittle by the edges of th'e'belt during lateral swinging and willfinally be caughtup again by the belt and carried away. Figure- 6 showsthe belt under excessive loading at a local point, and will be seen thatas the belt recovers from this curv'easit approaci'iesa-roiler 15*, itwill continuously prevent debris from falling un'de' r'the' edges.Owin'g't'o the obliquity of theinwardly inclined portion 11 of the antispillage shelves, the belt is caused to take a substantially concavecross section which results inthrowing the material down into the centreof the belt. The result is that those portions of the belt edges whichactually rub along the portions 11 of the anti-spillage shelves are: notengaged therewith with any substantial amount of friction such, forexample, as they would be if the shelves were horizontal and the endportions of the belt which rested upon them were actually supportingsome of the material. The clearance between the shelves and the belt inthe ui'i'loa'dr'ad' position is designed sothat the amfount-ofrubbingbetween the belt and the shelves when the belt is loaded may be lightwithout unduly increasing the endwise. ten: siononth'ebelt...Nevertheless, the belt definitely contacts with the shelves under allworking-conditions of load since its edges are adapted to form a slidingcontact with the arcuate" portions: 12. of the shelves." Thus, when thebelt is loaded lightly its edges contact with the upper parts oftheportions 12, and when it isloaded more heavily they contact-withthe'lower parts of theportions 12.

Figure 6 shows the fihal' position under. a

maxiinu nworkingload 'at'a point intermediate a pairofsupporting-rollers 15'. In this position theedges of the-beltcontactf'or aslight distance rectilinearly with the oblique rectilinearportions'll of the shelves.

pared with the saving which is eff'ected'in cleaning'up. i. e. freeingthebearings and returning idle belt length from spillage which" isotherwiseliable'to collect unless'the belt is enabled to contact withtheshelves in'all conditions ofload, which'requirement is ensured by theprovision of'the arcuate portions 12';

with whichthe moving belt is enabled tomalie asliding cont'act'as itlifts and sags and sways from sidetoside;

1. Forusein a belt conveyer, a casting including; a bearinirfora,roller, a pair-of supports for anti spillage shelves, and a webforattachment to a supporting" frame.

2; ln'azbelt conveyer, the combination ofa belt, supporting rollerstherefor, interrupted arcuate anti-spillage shelves with which the beltcan make a contact according to itsload, and bearings for said rollerslocated beneath the belt and forming a continuous channel with saidshelves.

3. In a belt conveyer, the combination of a belt, supporting rollerstherefor, interrupted anti-spillage shelves below the beltedges, andbearings for said rollers located beneath the=bel-t', said bearingsforming a continuous channel with said shelves.

t. A belt conveyer including a belt, rolling supports for'the' belt,anti-spillage shelves for cooperation with the edges of the beltsupported intermediate the rollers, said shelves including arcuateportions underlying and extending beyond the edges of the belt. thearcuate portions of the shelves providing for sliding movement of thebelt during travel without separation of the belt edges from suchshelves.

5. In a belt conveyer, a belt, roller supports therefor, andanti-spillage shelves supported intermediate the rollers and including arounded area directly underlying the free edges of the belt andproviding a belt contacting surface to facilitate sliding movement ofthe belt without separation, the shelves including a substantially flatarea inwardly of the rounded area.

6. In a belt conveyer, a belt, roller supports therefor, andanti-spillage shelves supported intermediate the rollers and including arounded area directly underlying the free edges of the belt andprovidinga belt contacting surface to facilitate sliding movement of the beltwithout separation, the shelves including a substantially flat, inwardlyand downwardly inclined area. 1

In testimony whereof I alfix my signature.

TAGE GEORG NYBORG.

